Curtain roller



A. K. YGGER CURTAIN ROLLER Nov. 1, 1932.

Filed Oct. :51. 193i 2 2+ I W MM M 2 /Z 2/ M Wr/M 7 7 7 2+ Illlllll aye? A TTORNEY ill Patented Nov. 1, 1932 AIlIBEBT KABLSSON YGGER, or NEW YORK, n. Y.

PATENT OFFICE CURTAIN ROLLER Application filed October 31, 1931. Serial No. 572,269.

This invention relates to improvement in a spring roller used for curtains.

Objects:

Among the principal objects which the invention has in view are: to provide a roller having means to limit. rewinding;'to obtain full intensity of the rewinding spring to the rewound position and at the same time prevent theroller from rewinding beyond a definite position; to include the mechanism entirely within the roller in the usual spring compartment; to secure simplicity of construction and operation; and; to' obtain other advantages and results 'as i may be brought out in the following description.

In the drawing:

Figure 1 is a longitudinal sectional view of a roller embodying my invention; v

Figure 2 is a plan of interior parts of the roller showing the limiting mechanism, and

shown as taken on line 22 of Figure 1;

Figure 3 is a sectional view shown astaken,

on the line 33 of Figure 2;'

Figure 4 is a sectional view shown as taken on the line of Figure 2; and

. Figure 5 is a longitudinal sectional view of a roller in modified form.

In the description: p

In one specific embodiment of theinvention illustrated in said drawing, the reference numeral 10 indicates a curtain roller and provided withanactuating spring 11 within an end compartment of the roller; At present curtain or'shade rollers, when the spring has been overwound will invariably rotate at a rapid rate of speed and keep rotating until either the energy of the spring is expended or otherwise cause the curtain or shade to rotate on the roller until out of reach of the operator. In'the present invention I have provided suitable parts to be hereafter described which will remove the inconveniences usually met in. the present day shade rollers.

In carrying out the invention'and refer- I ring more particularly to Figures 1 to 4.- inclusive,I have provided a screw threaded stud 12 mounted axially within the spring compartment of the roller 10. The outer end of said screw threaded studis suitably se' cured to the outside of the roller by having attached thereto the usual flattened end or clip 13 for reception in a wall bracket 14. The opposite end of said screw threaded stud 12 is secured within the roller, and to hold the same in rigid position I have attached a yoke or U-shaped member 15 in parallel relation with the roller. Thefree ends or outer ends of said yoke or U-shaped member extend through a metal disk 16 secured to the outer end face of the roller 10. I The ends 17 of said yoke 0r U-shaped member are preferably shouldered which prevent the same from accidently pressing through the disk as pressure is applied when the roller rotated. V

In operation of the roller and to which the feature of this invention is particularly directed, the screw threaded stud 12 has mounted thereon a nut 18 having cut out portions 19 on either. side and substantially the width of the legs of the yoke or U-shaped member 15. Said legs in this instance may be utilized as tracks or guides 21 for the cut out portions of the nut 18; As the roller is rotated, the nut may move backwardly or forward as the case may be, but will not rotate with the screw threaded stud. Bearing against the nut 18 and against the cross-head of the yoke or U- shaped member 15, I have provided a coil spring 20 loosely mounted on the screw threaded stud 12. Said coil spring in this instance may preferably be used as a cushion ing or limiting means when a curtain (not shown) is raised from its lowered position, and will be here called for convenience astopping-spring. When the roller is rotated upwardly, the nut travels toward the cross-head of the yoke or U-shaped member, and said stopping spring acts tolimit the movement of the nut, first cushioning the rotation and ultimately limiting rotation of the roller.

when said spring 20 becomes completely compressed.

The inner end of screw threaded stud 12 passes rotatably through the cross head of the yoke or Ushaped member 15 which forms a supporting bearing therefor, and beyond this cross head the stud has a collar 22 which cooperates with the larger screw threaded part veniently be held in position by having the respect to the stud.

- end of the roller operating by the actuating spring 11 inserted through a hole extending diametrically through the collar 22 and stud 12. The opposite end of this actuating spring is fixed as usual to the roller at the inner end of the roller.

of the roller compartment.

In operation, stud 12 remains stationary by virtue of the. usual engagement thereofin bracket 14. As the curtain is pulled down roller 10 is rotated and actuating spring 11 is wound up as usual. While this winding of the actuating spring is taking place, the yoke or U shaped member 15 is revolving around the stud 12, and this operation retracts nut 18 which rides toward the outer end of the stud, If so desired the parts can be proportioned so that nut 18 will engage the disk 16 before the curtain has been completely unwound, and will thereby prevent pulling the curtain off of the roller. When the curtain is raised, it again winds upon the roller under the influence of actuating spring 11. The yoke or U-shaped member is then revolving around the studin a direction to feed the nut 18. toward the cross head of the yoke or U- shaped member. The nut will therefore come into engagement with the stopping spring, 15 which becomes compressed until it will compress no further at which time the actuating spring can no'longer operate to rota e the roller. However, it is preferable to assemble the parts with the actuating spring 11 under tension at this stopped position so the curtain will be actuated very positively to a definite elevated position.

Referring now to Figure 5, I have shown a similar roller 10, the end of which provides a spring compartment, and has an actuating spring 11 therein for winding up the curtain on the roller. In this instance there is shown a stud 23 projecting through the end disk 24 of the roller 'andhaving a flattened end or clip 13 as heretofore, so that the stud will be held stationary notwithstanding rotation of the roller. In this instance the stud 23 extends substantially thedepth of the spring compartment and is journaled in convenient manner at the inner end of the compartment,

as for instance, by insertionin a socket formed centrally of a spring holding block 25. Actuating spring 11 is coiled about this stud and the outer end of said spring is secured with For this purpose I have shown a collar 26 on the stud at a distance from the end disk 24, said collar 26 is secured to the stud in suitable manner as by a pin or screw 27, and furthermore, provides means such as an ear 28 into which the end of said actuating spring 11 be hooked. A s milar ear 29 is provided'at the opposite end of this collar or end disk of the roller.

Between the end disk 24 of the roller 10 and collar 26 on the stud 23 within the spring compartment is mounted a stopping spring 30 which preferably unwinds while actuating spring 11 is winding, and winds while the actuating spring is unwinding. One end of this spring 30 is engaged in the ear 29 of the collar while the outer end of this spring ishooked into an eye 31 on the end disk 24 It will be observed as the actu ating spring unwinds for raising the curtain, the stopping spring is winding up but the tension of the stopping spring is made weak in comparison with that of the actuating spring so as to obtain only a moderate cushioning effect as the curtain approaches its upper position. However, the stopping spring 30 finally becomes wound around the stud in close engagement therewith so that it cannot be wound any tighter and therefore acts at'that point. to positively stop rotation of the roller and stud. This accordingly limits the raised position of the curtain. The actuating spring, as in the previous case is preferably still under tension at this limiting position so it will be effective in raisng the curtan right to a definite position.

I claim: i

1. A device as characterized comprising a curtain roller having a spring. for actuating the same, and another spring placed under compression as the roller rotates in one direction and functioning to limit rotation of the roller by said second spring reaching the limit of its permitted compression.

2 A device as characterized comprising in combination with a curtain roller having a spring compartment, a stud having a threaded portion within the said compartment, a nut on said stud,a yoke revolvable around the stud, said'yoke having a portion for rotating said nut and having a cross head for journalling the inner end of the stud, an actuating spring secured with respect to the curtain roller, and a stopping spring upon the stud interposed between said nut and cross head of the yoke.

3. A'device as characterized comprising in combination with a curtain roller having a spring compartment, a stud extending longitudinally within said compartment and having an actuating spring mounted upon an inner part thereof, the outer end of said spring being secured with respect to said stud and the inner end of said spring being secured with respect to the roller, and a stopping spring mounted upon said stud between the outer end thereof and the actuating spring, the inner end of said stoppingspring I being secured withrespect to the stud and a limit of compression functioning to definitely limit unwinding of the actuating spring.

4. A device as characterized comprising a curtain roller having a spring for actuating the same, and another spring placed under compression as the roller retractively is rotating and functioning to limit rotation of the roller by said second spring reaching the limit of its permitted compression.

5. A device as characterized comprising in combination with a curtain roller having a spring compartment, a stud having a threaded portion Within said compartment, a nut on said stud, a yoke revolvable around the stud, said yoke having a portion for rotating said nut and having a cross-head for journalling the inner end of the stud, an actuating spring secured with respect to the curtain roller, and a stopping spring upon the stud interposed between the cross-head of the yoke and the inner end of said roller.

ALBERT KARLSSON YGGER. 

